Modal Mass by D W Solomons for men's voice or for mixed choir
Modal Mass setting originally written for men's voices (ATTB) but with an alternative for mixed choir also available here (SATB).
The sound files (Ogg Vorbis files) for the men's voices version are performed by the composer (multitracking) but the SATB version is represented by electronic wind instruments.
The scores are available at Musica Neo (mixed choir-SATB)
and Musica Neo (male voices-ATTB)
A video of the SATB version as sung by Matthew Curtis of choraltracks can be enjoyed on here on Youtube